#ifndef _UNITLEN_H__
#define _UNITLEN_H__

#include "Unit.h"


class LengthUnit:public Unit
{

public:
   static LengthUnit & getINCH();
   static LengthUnit & getFEET();
   static LengthUnit & getYARD();
   static LengthUnit & getMILE();
   static LengthUnit & baseUnit();

private:
   LengthUnit(int ratio, std::string);
   static LengthUnit* baseUnit_m;

};



#endif
